Lack of expertise or staff to maintain the
service at national libraries
(Finland, Iceland and Sweden at the beginning)
Lack of interest for outside solutions from
the NL (Denmark, Norway)
Difficulty cooperating effectively with NL
outside of Scandinavia
Lack of positive interest and desire to
understand from projects running other solutions (defensive position about our
choice of URN:NBN)
Socially based problems
Not really technical ones